A continuity camera holder for iPhone 12/13/14 pro (may work on others, I have not tested) with MagSafe insert specifically designed to sit on top of the Benq PD3200U. It may work on other Benq Monitors assuming they have the same side profile, but I have no way of knowing.

My iPhone doesn't have a MagSafe compatible case, hence the bottom and back plate. If yours does, feel free to remove the back and bottom, that will then make it work across all iPhone sizes.

Print settings:
Tree supports under the 90* holder. None for the MagSafe.
Everything else however you want.
I printed:
PLA, 0.6mm nozzle, 0.3mm layer, 0.6mm walls, 4 walls, 4 top/bottom, 0% infill